Shipping Info:


Item #: 331997522

Micro-light, weather-resistant bivy sack. The diminutive, weather-resistant MSR E-Bivy sack adds the ideal amount of protection for wide range of situations without adding much to the pack. It will block wind, dew, spindrift and even light precipitation, adding valuable warmth and comfort when used under tarps, on open bivies and for winter camping. It can also be tossed into a pack lid on any trip, providing essential protection for an unplanned night in the hills.


  • Highly Breathable: Increased fabric breathability minimizes internal condensation
  • Versatile: Silnylon top and tough, DuraShield™-coated waterproof bottom protect from dew, frost, wind and light precipitation while adding warmth to any sleep system.
  • Compact: Weighs a mere 250 g (9 oz) and packs ultra-small


  • Dimensions: 88" L x 36" W (head) 23" W (foot)
  • Minimum Weight 9 oz (250 g)
  • Packed Weight 10 oz (295 g)
  • Packed Size 7 x 4" (18 x 10 cm)
  • Rainfly Fabric 30D ripstop nylon silicone
  • Floor Fabric 40D ripstop nylon 10,000 mm Durashield polyurethane & DWR